Annotations — turns on or off automatic backup of your last location read, all of your notes, and bookmarks on all of your purchased content.
Storage — shows the free storage space available on your Kindle and any inserted SD memory card. If you do not have an SD memory card inserted, the second bar will be gray.
Software Version — indicates which version of software your Kindle is using.
Registering or Deregistering Kindle
Your Kindle needs to be registered with your Amazon.com account information to use many of the Kindle features such as purchasing content. If your Kindle is lost or transferred to another user, you should deregister your Kindle from your account. The process to register or deregister is described below. You can also register or deregister your Kindle on the Manage Your Kindle page on:
http://www.amazon.com/manageyourkindle
Registering Your Kindle
If your Kindle is not already registered or if the registration is incorrect, follow these steps:
1.Turn on Whispernet if it is not already on.
2.If you are not already on the Home screen, press the Home key.
3.Scroll to the Menu selection, and press the select wheel.
4.Select "Settings" from the menu.
5.Select "Register" from the Registration section.
6.You will see a text entry box at the bottom of the screen to enter your Amazon.com user name (the
7.After entering your user name, you will see a text entry box for entering your Amazon.com password.
8.Press the select wheel to finish the registration process or select "Cancel" to cancel your registration.
Tip: If your Amazon user name or password contains characters not present on the Kindle
keyboard, press the SYM key 
on the bottom of the keyboard to see a menu of additional characters and select the character you require.
Once registered, you can make purchases on the Kindle Store, convert personal documents on Amazon, use Basic Web, and take advantage of other
Deregistering Your Kindle
If you want to transfer ownership of your Kindle or return it for service or recycling, you should deregister it to prevent unauthorized purchases. The process is similar to the registration process described above. Just select "Deregister" from the Registration section and your "Account Name" will